304139999 has 2 divisors, whose sum is σ = 304140000. Its totient is φ = 304139998.

The previous prime is 304139993. The next prime is 304140007. The reversal of 304139999 is 999931403.

It is a weak prime.

It is an emirp because it is prime and its reverse (999931403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304139999 - 2⁸ = 304139743 is a prime.

It is a super-2 number, since 2×304139999² = 185002277983440002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304139993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152069999 + 152070000.

It is an arithmetic number, because the mean of its divisors is an integer number (152070000).

Almost surely, 2^304139999 is an apocalyptic number.

304139999 is a deficient number, since it is larger than the sum of its proper divisors (1).

304139999 is an equidigital number, since it uses as much as digits as its factorization.

304139999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 236196, while the sum is 47.

The square root of 304139999 is about 17439.6100587140. The cubic root of 304139999 is about 672.4982833250.

The spelling of 304139999 in words is "three hundred four million, one hundred thirty-nine thousand, nine hundred ninety-nine".